摘要:
A header assembly including a base and a platform extending through the base and substantially perpendicular thereto. The platform includes conductive pathways that connect electrical components on either side of the base, and the conductive pathways cooperate to form a connector at the first end of the platform. A laser is mounted on top of a thermoelectric cooler that is directly joined to the second end of the platform. The laser and thermoelectric cooler are enclosed in a hermetic chamber cooperatively defined by the base, the platform, and a cap that is joined to the base. A photodiode optically coupled with the laser and a thermistor thermally coupled with the laser cooperate with the thermoelectric cooler and a control circuit to facilitate control of the performance of the laser.
摘要:
A header assembly is provided that includes a base having a device side and a connector side. The header assembly further includes a platform attached to the base and positioned in a predetermined orientation with respect to the base. The device side of the base cooperates with a cap to define a hermetic chamber wherein one or more optoelectronic components, such as optical transmitters and optical receivers, are disposed. The platform includes an inside portion proximate the device side of the base and an outside portion proximate the connector side of the base, and the platform further includes at least one conductive pathway extending substantially through the platform so as to facilitate electrical communication between components disposed on the device side of the base, and circuits, devices and systems disposed on the connector side of the base.
摘要:
Various systems and methods of monitoring laser safety by sensing contact of the system with a sample are provided. The system includes a focusing element for focusing an incident light from a laser light source onto a sample, an optical element having a collection zone for collecting a signal from the sample, a reflected light sensor for sensing a reflected light from the sample, wherein the reflected light sensor is located outside the collection zone of the optical element and on an inner surface of a housing of the system, an electrical circuit operably connected to the reflected light sensor and the laser light source and configured to control power to the laser light source in accordance with the reflected light sensed by the reflected light sensor and a spectral analyzer for processing the signal. Methods and other systems are also described and illustrated.
摘要:
Methods and processes are disclosed for calibrating optoelectronic devices, such as optoelectronic transceivers and optoelectronic receivers, based upon an avalanche photodiode breakdown voltage. In general, the method involves adjusting a reverse-bias voltage of the avalanche photodiode until avalanche breakdown of the avalanche photodiode occurs. An optimized APD reverse-bias voltage is then determined by reducing the reverse-bias voltage at which avalanche breakdown occurs by a predetermined offset voltage. This process is performed at a variety of different temperatures. Information concerning each temperature and the corresponding optimized APD reverse-bias voltage is stored in a memory of the optoelectronic device.
摘要:
A controller for controlling the reverse-bias voltage of an avalanche photodiode in a transceiver or receiver. The controller includes memory for storing information related to the avalanche photodiode, and analog to digital conversion circuitry for receiving an analog signal corresponding to the temperature of the avalanche photodiode, converting the received analog signal into a digital value, and storing the digital value in a predefined location within the memory. Control circuitry in the controller controls the operation of the avalanche photodiode and a temperature lookup table store in the memory. A serial interface enables a host device to read from and write to locations within the memory. The invention also controls the reverse-bias voltage of an avalanche photodiode in a transceiver or receiver.
摘要:
An unmanned aerial vehicle including a controller operating in a search mode of operation where a receiver of an acquisition sensor searches for a target and causes flight control surfaces to guide the vehicle in a downward spiral path, a terminal mode of operation where the acquisition sensor detects a target and causes flight control surfaces to direct the vehicle toward the target, and an activation mode of operation where a trigger sensor detects a target within a predetermined distance to the vehicle and the controller activates a responder.
摘要:
An unmanned aerial vehicle including a controller operating in a search mode of operation where a receiver of an acquisition sensor searches for a target and causes flight control surfaces to guide the vehicle in a downward spiral path, a terminal mode of operation where the acquisition sensor detects a target and causes flight control surfaces to direct the vehicle toward the target, and an activation mode of operation where a trigger sensor detects a target within a predetermined distance to the vehicle and the controller activates a responder.
摘要:
The present disclosure relates to a thermo formed tray having an upper half and a lower half. The upper half and the lower half define a closed configuration when the upper half and the lower half are substantially adjacent one another and an open configuration when the upper half and the lower half are substantially apart from one another. A predetermined area is provided in at least one of the upper half and the lower half for containing a product in the closed configuration, the product having at least one radioactive seed held in a predetermined seed configuration. At least one cutter guide is contained in the thermo formed tray.
摘要:
The present disclosure relates to a thermo formed tray having an upper half and a lower half. The upper half and the lower half define a closed configuration when the upper half and the lower half are substantially adjacent one another and an open configuration when the upper half and the lower half are substantially apart from one another. A predetermined area is provided in at least one of the upper half and the lower half for containing a product in the closed configuration, the product having at least one radioactive seed held in a predetermined seed configuration. At least one cutter guide is contained in the thermoformed tray.
摘要:
A loss of signal assert and de-assert level programming mechanism in an optical transceiver coupled to a host computing system. A control module is connected to the host so as to receive the programmable loss of signal level. A post-amplifier detects when the receive power drops below a loss of signal level. However, in this case, instead of the loss of signal level being static, a loss of signal level adjustment mechanism changes the loss of signal level detected by the post-amplifier as directed by the programmable loss of signal level received from the host. The loss of signal assert and de-assert levels may be calibrated by comparing receive power to the threshold for assertion and de-assertion of the loss of signal.